A performance comparison of two time diversity systems using OS-CFAR detection for partially correlated chi-square targets and multiple target situations

In radar systems, detection performance is always related to target models and background environments. In time diversity systems, the probability of detection is shown to be sensitive to the degree of correlation among the target echoes. In this paper, we derive exact expressions for the probabilities of false alarm and detection of a pulse-to-pulse partially correlated target with 2K degrees of freedom for the Order Statistics Constant False Alarm Rate (OS-CFAR) detector. The analysis is carried out for the "non conventional time diversity system" (NCTDS) and multiple target situations. The obtained results are compared with the "conventional time diversity system" (CTDS).